替换图片button放大效果的实现

来源：互联网发布：悟空知乎编辑：程序博客网时间：2024/06/05 03:00

1,需求背景；

按钮按下时图片变大；松开时缩小；这种情况很多时候我们在onTouch事件是来个控件的缩放动画就可以轻松实现；但是UI提出不能这样做，图片放大后效果不一样的；有特效；那就UI切二个大小相同的图片，我们直接替换就好了；可是UI发现图标都按照放大的切根本摆不下；最后就切了二个不通大小的图片；

如果，你直接替换图片的时候你会发现放大的图片是被压缩的；

2，直接上代码；懂得人自然秒懂；

public class MyZoomButton extends RelativeLayout {    String text ;    Drawable imgNormal ;    Drawable imgPressed ;    OnClickListener l ;    public void setOnClickListener( OnClickListener l){        this.l=l;    }    public MyZoomButton(Context context) {        this(context,null);    }    public MyZoomButton(Context context, AttributeSet attrs) {        this(context, attrs,0);    }    public MyZoomButton(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init(context,attrs);        addUI(context);    }    private void init(Context context, AttributeSet attrs) {        TypedArray typedArray = context.obtainStyledAttributes(attrs,R.styleable.zoom_button);        text = typedArray.getString(R.styleable.zoom_button_text);        imgNormal = typedArray.getDrawable(R.styleable.zoom_button_imageview_normal_drawable);        imgPressed = typedArray.getDrawable(R.styleable.zoom_button_imageview_pressed_drawable);        if(text==null||imgNormal==null||imgPressed==null){            Log.e("ZoomButton","typedArray is  have null !!!!");        }        typedArray.recycle();    }    private void addUI(Context context) {        final ImageView img = new ImageView(context);        img.setClickable(true);        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(308,439);        lp.addRule(RelativeLayout.CENTER_VERTICAL);        img.setLayoutParams(lp);        img.setImageDrawable(imgNormal);        addView(img);        final TextView textView = new TextView(context);        textView.setTextColor(Color.parseColor("#c0d8ff"));        textView.setTextSize(40);        textView.setGravity(Gravity.CENTER);        textView.setText(text);        final RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);        lp2.topMargin=249;        lp2.rightMargin= 15;        textView.setLayoutParams(lp2);        addView(textView);        img.setOnTouchListener(new View.OnTouchListener() {            @Override            public boolean onTouch(View view, MotionEvent motionEvent) {                if (motionEvent.getAction()==MotionEvent.ACTION_DOWN){                    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(328,439);                    lp.addRule(RelativeLayout.CENTER_VERTICAL);                    img.setLayoutParams(lp);                    img.setImageDrawable(imgPressed);                    lp2.rightMargin= 0;                    textView.setLayoutParams(lp2);                    textView.setTextSize(50);                }else if(motionEvent.getAction()==MotionEvent.ACTION_UP){                    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(308,439);                    lp.addRule(RelativeLayout.CENTER_VERTICAL);                    img.setLayoutParams(lp);                    img.setImageDrawable(imgNormal);                    lp2.rightMargin= 15;                    textView.setLayoutParams(lp2);                    textView.setTextSize(40);                }                return false;            }        });        img.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View view) {                   if(l!=null){                       view.setId(getId());   // 这里为什么传我的父类的id呢 就是因为我不希望父类被点击；当又要被看成父类被点击                       l.onClick(view);                   }            }        });    }}

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